Aleph-null bottles of beer on the wall,
Aleph-null bottles of beer,
You take one down, and pass it around,
Aleph-null bottles of beer on the wall.

Graph Theorems in Song Lyrics by Cat Stevens

Last stanza of Cat Stevens - "Sitting"

Oh life is like a maze of doors and they all open from the
side you're on
Just keep on pushing hard boy, try as you may
You're going to wind up where you started from
You're going to wind up where you started from

Graph Theorem: In a random walk of 'k' steps in a directed graph on 'n' vertices, the probabilty that the walk returns to the initial vertex approaches one as 'k' approaches infinity.

Cat Stevens forgot the condition that the graph must be strongly connected, but I guess that would have been hard to fit into the lyrics.

Nothing is better than eternal happiness.
A ham sandwich is better than nothing.
Therefore...